Leprosy is a chronic granulomatous disease caused by Mycobacterium leprae that affects the nerves and skin. Based on WHO classification, leprosy is classified into PB (paucibacillary) and MB (multibacillary). In order to meet the goals of WHO "zero-leprosy roadmaps", the use of vaccines is one of the pillars of strategy and a key component of research. The BCG vaccine have the main purpose to p…